Casing failure problem is getting increasingly serious as cyclic steam stimulation of super heavy oil comes to latter cycles.Some casings cannot be repaired by swage and patch.

• 超稠油油井随着吞吐周期的增加,套管损坏现象日益严重,有些井虽然采用套管整形及套管补贴技术,但依然无法修复,目前这种情况已成为制约油田进一步发展的主要问题。